I got scammed and it hurts

Scammer claimed to be a senior officer from ATO. She claimed that victim had not paid tax and accumulated $2590 in debt, which has resulted in an arrest warrant being released to the police for victim. Scammer then proceeded to list out legal repercussions and offered to settle the matter privately with ATO as long as victom does not reveal tax fraud case to anyone, including family members. Scammer provided case ID no., government badge no., and arrest warrant no. Scammer proceeded to get victim to plead case by saying it was a honest mistake with a higher official for a second chance before getting a payment option reopened. Scammer then explained that victim must keep on the line and must not disclose the process to anybody otherwise victim will be arrested due to tax fraud. There was a 45 minute time limit for the payment to be completed before I will be officially arrested if caught. Payment option was in the form of hidden tax paper voucher, which could be claimed at kmart, gas station, 7/11, etc. Scammer deliberately told victim to act happy and carefree to ensure that cashier of the shop does not notice victim's distress as they will obtain tax commission if victim is handed over to the police for tax fraud by the cashier. Scammer then instructed victim to search for the biggest nominations on iTunes card and buy all of the ones available to pay off debt. Victim followed all instructions however was informed by cashier that it was a scam.